Remove code handling old SDKs.

Chromium uses the 10.14 SDK, so remove any code that handles the case
of an old SDK being used.

Bug: 1044838
Change-Id: I5db561bfaf5b8e6aac7352dac010d90fb202bdf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2020883
Auto-Submit: Avi Drissman <avi@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735435}

chrome/browser/app_controller_mac.mm

@@ -1640,13 +1640,8 @@ static base::mac::ScopedObjCClassSwizzler* g_swizzle_imk_input_session;
 
 - (BOOL)application:(NSApplication*)application
     continueUserActivity:(NSUserActivity*)userActivity
-#if !defined(MAC_OS_X_VERSION_10_14) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_14
-      restorationHandler:(void (^)(NSArray*))restorationHandler
-#else
       restorationHandler:
           (void (^)(NSArray<id<NSUserActivityRestoring>>*))restorationHandler
-#endif
 {
   if (![userActivity.activityType
           isEqualToString:NSUserActivityTypeBrowsingWeb]) {

components/remote_cocoa/app_shim/native_widget_ns_window_bridge.mm

@@ -170,16 +170,6 @@ namespace {
 
 using RankMap = std::map<NSView*, int>;
 
-// SDK 10.11 contains incompatible changes of sortSubviewsUsingFunction.
-// It takes (__kindof NSView*) as comparator argument.
-// https://llvm.org/bugs/show_bug.cgi?id=25149
-#if !defined(MAC_OS_X_VERSION_10_11) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_11
-using NSViewComparatorValue = id;
-#else
-using NSViewComparatorValue = __kindof NSView*;
-#endif
-
 // Return the content size for a minimum or maximum widget size.
 gfx::Size GetClientSizeForWindowSize(NSWindow* window,
                                      const gfx::Size& window_size) {
@@ -191,8 +181,8 @@ gfx::Size GetClientSizeForWindowSize(NSWindow* window,
   return gfx::Size([window contentRectForFrameRect:frame_rect].size);
 }
 
-NSComparisonResult SubviewSorter(NSViewComparatorValue lhs,
-                                 NSViewComparatorValue rhs,
+NSComparisonResult SubviewSorter(__kindof NSView* lhs,
+                                 __kindof NSView* rhs,
                                  void* rank_as_void) {
   DCHECK_NE(lhs, rhs);